/*
 * http://code.google.com/p/ametro/
 * Transport map viewer for Android platform
 * Copyright (C) 2009-2010 contacts@ametro.org Roman Golovanov and other
 * respective project committers (see project home page)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *  
 */
package org.ametro.model.ext;

public class ModelPoint {

	public int x;
	public int y;
	
	public ModelPoint(){
	}
	
	public ModelPoint(int x, int y){
		this.x = x;
		this.y = y;
	}

	public void offset(int dx, int dy) {
		x += dx;
		y += dy;
	}

	public boolean isZero() {
		return x==0 && y==0;
	}
	
	public static boolean  isNullOrZero(ModelPoint p){
		return p==null || (p.x==0 && p.y==0);
	}

	public int distance(int x0, int y0) {
		final int dx = Math.abs(x-x0);
		final int dy = Math.abs(y-y0);
		return (int)Math.sqrt(dx*dx+dy*dy);
	}
	
}
